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transfer(), transfer16()


SPI transfer is based on a simultaneous send and receive: the received data is returned in receivedVal (or receivedVal16). In case of buffer transfers the received data is stored in the buffer in-place (the old data is replaced with the data received).


receivedVal = SPI.transfer(val)
receivedVal16 = SPI.transfer16(val16)
SPI.transfer(buffer, size)


val: the byte to send out over the bus
val16: the two bytes variable to send out over the bus
buffer: the array of data to be transferred


the received data

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